Video from the cab of the Amtrak train that hurtled off the tracks in Washington state, killing three people and injuring dozens, shows that the engineer did not appear to be using a cellphone or any other personal electronic device just before the derailment, federal investigators said Friday.

Experts say it's possible the engineer on an Amtrak train that derailed as it hurtled into a curve at more than twice the speed limit was distracted for an extended period of time before the train plunged off an overpass and onto a busy interstate, a key factor in the investigation.

The rush to launch service on a new, faster Amtrak route near Seattle came at a deadly cost -- critical speed-control technology that could have prevented a derailment was not active before the train set off on its maiden voyage.

Investigators are looking into whether the Amtrak engineer whose speeding train plunged off an overpass, killing at least three people, was distracted by the presence of an employee-in-training next to him in the locomotive, a federal official said Tuesday.

An Amtrak train making the first-ever run along a faster new route hurtled off an overpass south of Seattle on Monday and spilled some of its cars onto the highway below, killing at least three people, injuring more than 100 and crushing two vehicles, authorities said.

Six cars of a Canadian Pacific freight train have gone off the tracks in southern Alberta near Lunbreck Falls. Crowsnest Pass RCMP say no one was injured in the derailment and no hazard materials were spilled.